Anti-distraction helmet aka "the Isolator" was invented by the science fiction writer, inventor, and editor Hugo Gernsback. It consists of a wooden helmet which blocked out sound and limits vision in order to help the wearer focus on whatever task they had in hand.
More:
https://manifold.umn.edu/read/the-pe...b-d070728205f9
Previously:
Vintage razor sharpener - GIF
Antique tonsil guillotines - photos
Antique multi-book research carousel - photo
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